Why didn't you just say no..

this way disappointment would have been averted

This is the standard trick employed by Frenchies who come to Australia...

Bonjour
May I borrow your pump
Au revoir!

I heard of a guy buying someone completely new lines, just because he was asked nicely...

Luckily not all Euros are like that (neither do I believe they all drop stuff in the dunes). Most visitors bring in some much needed revenue for our state. And not all of us are coward punching pricks either. Or meth heads.
Good on you for not changing your attitude. I have a few pumps sitting around in the shed. Happy to give you one for free (brand new Ozone, does not have a gauge though). If you happen to be down our way.

I think the more likely scenario is that he just put in back in the wrong bag,
it's happened to me a couple of times,
fortunately I saw the guys choosing the wrong bag(not their own)

I once thought a guy stole my screwdriver, I later (much later) found that he'd he just put it in the zipper section of my bag that I don't use.

....or maybe the guy just stole your pump

Rads said..
Aaaw so sweet......,,...group hug

I am equally excitable for the good old masculine sh$t fight in the pond mate
It's just that I arrived at an age where I don't think tolerance and generosity is gay. No tolerance from my side at my local though

My take on this
Smoking hot chick approaches upwind
Matey gets a whiff of her
She puts her sexiest look and accent on
May I borrow your pump
Quickly matey brain clicks into gear and says certainly, knowing he will gear a great view of her pear shaped cheeks,
Sucker he says to himself as he gloats
He dives his kite and rides of with a semi on
Sucker she says , and adds another pump to her collection